Fluorinated Cathode Patterning for Transparent Display Electrodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrode patterning methods for display devices, such as shadow masking and laser irradiation, are inefficient and costly, leading to distorted patterns and substrate damage, which are not suitable for mass production of transparent displays with high transmittance.
Innovation Solution
A fluorinated compound represented by Formula (2) is used for patterning metals or electrodes, allowing precise electrode formation without a shadow mask, facilitating the production of transparent displays with high light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shadow mask method is used for electrode patterning, then electrode pattern can be formed, but mask bending occurs during high-temperature deposition causing pattern distortion and increased maintenance cost
Solution Approach 1:
The patent removes the shadow mask component entirely from the patterning system, replacing it with a direct photoresist-based patterning method. This extraction eliminates the mask bending problem during high-temperature deposition while maintaining electrode pattern precision through direct photolithographic patterning of the cathode layer.
Solution Approach 2:
The patent replaces the mechanical shadow mask system with a photochemical patterning process. Instead of using a physical mask that undergoes thermal deformation, the invention uses photoresist coating and UV irradiation to define electrode patterns, substituting mechanical structures with chemical-based patterning that is thermally stable.
2Manufacturing precision
If shadow mask method is used for electrode patterning, then electrode pattern can be formed, but time and cost for mask maintenance are required reducing productivity
Solution Approach 1:
By removing the shadow mask component, the patent eliminates all associated maintenance activities including cleaning, inspection, and replacement. The direct photoresist patterning method requires no mask maintenance, enabling continuous mass production without interruption and significantly improving productivity while maintaining pattern precision.
Solution Approach 2:
The patent employs a disposable photoresist-based patterning approach where the pattern definition is achieved through a single-use photoresist layer that is processed and discarded after one cycle. This eliminates the need for durable but maintenance-intensive masks, allowing rapid re-patterning for mass production without mask maintenance downtime.
3Manufacturing precision
If laser method is used for electrode patterning, then electrode pattern can be formed, but substrate damage may occur due to improper laser intensity
Solution Approach 1:
The patent replaces the laser-based patterning method with a photoresist-based photolithographic process. Instead of using high-energy laser beams that can damage the substrate, the invention uses UV irradiation through a photomask onto a photoresist layer, which is a gentler, more controllable process that defines electrode patterns without thermal damage to the underlying substrate.
Solution Approach 2:
The patent introduces a photoresist layer as an intermediary between the pattern definition step and the electrode formation. The photoresist absorbs the UV energy and undergoes chemical changes to define the pattern, acting as a buffer that protects the substrate from direct exposure to high-energy radiation, thereby preventing substrate damage while achieving precise electrode patterning.
4Manufacturing precision
If conventional electrode patterning method is used, then electrode can be patterned, but light transmittance is reduced affecting transparent display performance
Solution Approach 1:
The patent removes the shadow mask component that physically blocks light during deposition, replacing it with a direct patterning method. This extraction eliminates the need for thick metal mask structures that would reduce light transmittance in the final transparent display, allowing maximum light transmission while maintaining precise electrode patterns through photoresist-based definition.
Data Source
Figure 1~2
Figure 3~4a
Figure 4b~5a
AI summary
The present invention provides a fluorinated compound for patterning a metal or an electrode (cathode), an organic electronic element using the same, and an electronic device thereof, and by using the fluorinated compound as a material for patterning a metal or an electrode (cathode), it is possible to form a fine pattern of the electrode without using a shadow mask, since it is easy to manufacture a transparent display having high light transmittance, it is possible to more easily apply UDC.